2.2 configConstant

1. Common Configurations

This method is used to configure JFinal constant values, such as the development mode constant "devMode". The following code presents some commonly used configurations:

public void configConstant(Constants me) {
    // Configure development mode, true indicates development mode.
    me.setDevMode(true);
    
    // Configure AOP proxy to use cglib, otherwise, JFinal's default dynamic compilation proxy will be used.
    me.setToCglibProxyFactory();
    
    // Configure dependency injection.
    me.setInjectDependency(true);
    
    // Configure whether to inject dependencies into the superclass of the injected class.
    me.setInjectSuperClass(false);
    
    // Configure to use the slf4j logging system; otherwise, log4j will be used by default.
    // You can also configure your extended logging system implementation with me.setLogFactory(...).
    me.setToSlf4jLogFactory();
    
    // Set the Json conversion factory implementation class, more details in Chapter 12.
    me.setJsonFactory(new MixedJsonFactory());
    
    // Configure the view type, the default is the JFinal enjoy template engine.
    me.setViewType(ViewType.JFINAL_TEMPLATE);
    
    // Configure the basic download path, the default is "download" under webapp.
    me.setBaseDownloadPath(...);
    
    // Configure the basic upload path, the default is "upload" under webapp.
    me.setBaseUploadPath(...);
    
    // Configure 404 and 500 pages.
    me.setError404View("/common/404.html");
    me.setError500View("/common/500.html");
    
    // Enable parsing of json requests, a new feature in version 5.0.0.
    me.setResolveJsonRequest(true);
}

In development mode, JFinal will generate a report for every request, such as displaying the current request's URL, Controller, Method, and the parameters carried by the request.

2. Other Configurations

Other configurations:

public void configConstant(Constants me) {
    // Configure encoding, the default is UTF8.
    me.setEncoding("UTF8");
    
    // Configure the date pattern used for converting Date type in JSON.
    me.setJsonDatePattern("yyyy-MM-dd HH:mm");
    
    // Configure whether to deny direct access to JSP. This is related to directly accessing .jsp files, and not related to renderJsp(xxx.jsp).
    me.setDenyAccessJsp(true);
    
    // Configure the maximum data size for file uploads, default is 10M.
    me.setMaxPostSize(10 * 1024 * 1024);
    
    // Configure the cache for CAPTCHA. Configuring a centralized shared cache can support distributed systems and clusters.
    me.setCaptchaCache(...);
    
    // Configure the separator for urlPara parameters, the default is "-".
    me.setUrlParaSeparator("-");
}